Vacuum pump



FIG. 1 is a front perspective view of a vacuum pump.

FIG. 2 is another front perspective view of the vacuum pump of FIG. 1.

FIG. 3 is a right side view of the vacuum pump of FIG. 1.

FIG. 4 is a left side view of the vacuum pump of FIG. 1.

FIG. 5 is a front view of the vacuum pump of FIG. 1.

FIG. 6 is a rear view of the vacuum pump of FIG. 1.

FIG. 7 is a top view of the vacuum pump of FIG. 1; and,

FIG. 8 is a bottom view of the vacuum pump of FIG. 1.

The elements shown in broken lines are included for the purpose of illustrating environment and form no part of the claimed design. 

CLAIM We claim the ornamental design for a vacuum pump, as shown and described. 